Sprout/sprout/compost/formats/left_channel.hpp
2014-02-22 16:32:51 +09:00

51 lines
1.4 KiB
C++

/*=============================================================================
Copyright (c) 2011-2014 Bolero MURAKAMI
https://github.com/bolero-MURAKAMI/Sprout
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/
#ifndef SPROUT_COMPOST_FORMATS_LEFT_CHANNEL_HPP
#define SPROUT_COMPOST_FORMATS_LEFT_CHANNEL_HPP
#include <sprout/config.hpp>
#include <sprout/utility/forward.hpp>
#include <sprout/range/adaptor/steps.hpp>
namespace sprout {
namespace compost {
namespace formats {
//
// left_channel_forwarder
//
class left_channel_forwarder {};
//
// left_channel
//
namespace {
SPROUT_STATIC_CONSTEXPR sprout::compost::formats::left_channel_forwarder left_channel = {};
} // anonymous-namespace
//
// operator|
//
template<typename Range, typename T>
inline SPROUT_CONSTEXPR auto
operator|(Range&& lhs, left_channel_forwarder const&)
-> decltype(
SPROUT_FORWARD(Range, lhs)
| sprout::adaptors::steps(2)
)
{
return SPROUT_FORWARD(Range, lhs)
| sprout::adaptors::steps(2)
;
}
} // namespace formats
using sprout::compost::formats::left_channel;
} // namespace compost
} // namespace sprout
#endif // #ifndef SPROUT_COMPOST_FORMATS_LEFT_CHANNEL_HPP